I have two sample classes that are used for de/serializing an XML file in tests.
XmlExampleBasicUnit.cs:
[YAXSerializeAs("Unit")]
public class XmlExampleBasicUnit
{
    [YAXSerializeAs("StringVar")]
    public String StringVar { get; set; }
    [YAXSerializeAs("Int32Var")]
    public Int32 Int32Var { get; set; }
    [YAXSerializeAs("DoubleVar")]
    public Double DoubleVar { get; set; }
    [YAXSerializeAs("DateTimeVar")]
    public String DateTimeVar { get; set; }
    [YAXSerializeAs("CharVar")]
    public String CharVar { get; set; }
}
XmlExampleCollectionOfUnits.cs:
[YAXSerializeAs("CollectionOfUnits")]
public class XmlExampleCollectionOfUnits
{
    [YAXSerializeAs("Units")]
    public List<XmlExampleBasicUnit> Units { get; set; }
    public XmlExampleCollectionOfUnits(List<XmlExampleBasicUnit> units)
    {
        Units = units;
    }
    public XmlExampleCollectionOfUnits()
    {
    }
}
I want to export a variable of XmlExampleCollectionOfUnits into an XML file that would be correctly formatted. This is a current function that is responsible for this:
public void Export<T>(String fileName, T result) where T : class
{
    YAXSerializer serializer = new YAXSerializer(typeof(T));
    using (FileStream fs = File.Create(fileName))
    {
        Byte[] info = new UTF8Encoding(true).GetBytes(serializer.Serialize(result));
        fs.Write(info, 0, info.Length);
    }
}
The problem is that this is using GetBytes() function which add some byte which is unrecognized by function that is responsible for importing data from an XML file. I have been trying to work this out with XmlTextWriter but with no success. I can get the String of a the content that I want to write into a file, but XmlTextWriter can't handle it.